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Debating between an A8 4.0 and S8 but..

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Debating between an A8 4.0 and S8 but..

 
Old 06-02-2017, 05:26 PM
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Originally Posted by shwank View Post
Thanks for the thoughts. All good stuff. On the A7 / S7, D3 / D4.. so are you saying wheels that fit the A7 will fit a S8 (I wouldn't be looking at a plus most likely)?

And luckily for me, my kids are still very small and by the time they got too cramped, I'd be looking for a new car.. which is why I'm so interested in the S8. I just don't see myself having a second car like a 911 anytime soon based on how often I need to have kids in my car.. so thinking the S8 is my shot for now!
Yes, A7 or S7 wheels are a direct fit with the same offsets as long as the relevant diameter goes with whatever D4 you buy. 9" width is common, which is the D4 norm. S8's are an easy fit in any stock 20's, and supposedly can take a factory 19. A8 4.0T's can go down an inch from there. Be careful that what I am not saying is D3 ones work--there the hub center was increased between generations, so it's not straightforward to use D3 wheels on a D4. My reference was to the tire size for D3's. A7/S7 wheels in 20's commonly are found with 265/35-20 tires; those are the D3 S8 size. You want a 265/40 or 275/40 for a D4 fitment in 20's to be at stock diameter range. FWIW, also know that the C7 A6/S6 (sister car to the A7/S7) is not a good wheel donor--offsets are too conservative and are typically 8-'s. Q5 turns out to be better donor if a somewhat narrow wheel is desired to go with narrow tire tread some prefer w/ winter tires.

Agreed if this car ownership cycle is not really beyond early teens, SWB works fine. Worked fine for me back with C5 A6 with those kind of ages--unless we went to the minivan in those years w/ kids friends added in.

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Old 06-02-2017, 07:39 PM
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Smallest wheel size that will fit on an A8 4.0t is 19".
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Old 06-02-2017, 07:55 PM
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Originally Posted by the_duke View Post
Smallest wheel size that will fit on an A8 4.0t is 19".
I don't think that is correct, at least with the "right" 18's. The brakes are 380's, correct? Brakes are 400 on an S8. Seeing your other reply in the brake cost thread, that rotor size question is maybe the delta. It is 400 on S8 (and S7 and S6), but I think it is 380 on 4.0T and 356 on 3.0T. I was confused myself on those sizes in past. You can barely do the (right) 19 on an S8. D3 W12 and S8 were 385's and you could do a factory 18 on those. In fact spare was a factory 18 base full size wheel if car was equipped w/ 20's.

If you go to the Audi.de web site and build an A8 (auf Deutsch), starting with a "Benzin" motor and then 4.0T, when you flip over to exterior it shows you the baseline wheel as an 18 x 8, since basically everything is/can be an option in a German Euro build. Here is the wheel selection page it shows:
Attached Thumbnails Debating between an A8 4.0 and S8 but..-screen-shot-2017-06-02-8.50.58-pm.png  

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Old 06-03-2017, 04:13 AM
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Originally Posted by shwank View Post
I should be in the market for a car in the next month or two and I thought I narrowed it down do an A8 4.0. I had an S7 but need space for 3 car seats and the A8 4.0 seemed like a likely fit. But, something keeps drawing me to an S8 and having something with its performance, but in such a stealth mode.

My biggest hangup on pulling the trigger on an S8 is having to get winter tires. I'm in PA and this would be a daily driver for me, even in the winter. I only had my S7 for 1 winter but it had all season tires on it. I would be looking for a 15-16 used S8 and all seem to come with summer tires that I see for sale.

I've read just about every thread from the past few years on winter tires, and it just is confusing to me, a non-technical car guy. Offset, -1 or -2, 21s vs 20s, buying off of ebay, will they fit, how will they actually look, etc.

Am I just over thinking this and is getting a set of winter tires easy? I'm guessing I could just get Audi ones and pay top dollar but I'd also prefer a cheaper route if possible.

I would love any thoughts from owners similar to me who had to get a second set of tires for the first time.

Thanks!
I live in Pittsburgh and got the s8 with 21" package, I went to hartmann wheels and got the exact rims in a 20" package and put firestone all seasons on, looks the same but I have some peace of mind if it does snow. I just put the 21"s on last week. Like the ride and the Hartmann 20"s I got 4 rims for $1000
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Old 06-03-2017, 01:37 PM
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Originally Posted by shwank View Post
@audirb thanks for the response! Where did you get your winter setup for your S8?
In the past I've purchased sets from Tire Rack - excellent selection and service and fair pricing. I have not bought any winter setups for the S8+ as I just acquired that beast a few days ago, so I'll deal with that in the fall. Audi sells complete sets which look very nice but are pricey.

MP4.2, thanks for the heads-up on the D3 wheels, I gave them in with the trade-in as the tires were shot and the wheels were beat-up after 9 winters in New England.

I have found the SWB (in either A8 form no longer available or S8 form) plenty big enough in the back, and having the advantage of a better driver's car and easier to park. Of course all of these cars are amazing, but it sounds like you are leaning S8, which is an awesome choice - go for it! As a guy I used to work with once said when talking about why he bought an incredible car, because "I'll be dead a long time".
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Old 06-03-2017, 04:55 PM
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Originally Posted by dougpaper View Post
I live in Pittsburgh and got the s8 with 21" package, I went to hartmann wheels and got the exact rims in a 20" package and put firestone all seasons on, looks the same but I have some peace of mind if it does snow. I just put the 21"s on last week. Like the ride and the Hartmann 20"s I got 4 rims for $1000
The Hartmann rims look nice and a great price. Thanks for the recommendation!
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Old 06-04-2017, 07:47 PM
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Default Minus Sizing For Winter

Originally Posted by MP4.2+6.0 View Post
Yes, A7 or S7 wheels are a direct fit with the same offsets as long as the relevant diameter goes with whatever D4 you buy. 9" width is common, which is the D4 norm. S8's are an easy fit in any stock 20's, and supposedly can take a factory 19. A8 4.0T's can go down an inch from there. Be careful that what I am not saying is D3 ones work--there the hub center was increased between generations, so it's not straightforward to use D3 wheels on a D4. My reference was to the tire size for D3's. A7/S7 wheels in 20's commonly are found with 265/35-20 tires; those are the D3 S8 size. You want a 265/40 or 275/40 for a D4 fitment in 20's to be at stock diameter range. FWIW, also know that the C7 A6/S6 (sister car to the A7/S7) is not a good wheel donor--offsets are too conservative and are typically 8-'s. Q5 turns out to be better donor if a somewhat narrow wheel is desired to go with narrow tire tread some prefer w/ winter tires.

Agreed if this car ownership cycle is not really beyond early teens, SWB works fine. Worked fine for me back with C5 A6 with those kind of ages--unless we went to the minivan in those years w/ kids friends added in.
I am a fan of smaller rim diameters and widths (minus sizing) for dedicated winters. the narrower tires are better for cutting through the snow and the taller sidewalls absorb rough winter conditions better. I ran 255/45R18 Dunlop Winter Maxx on 18X8's on my D3 S8 when I lived in CO. A flat in the snow is no fun. A D4 S8 could run 255/45R19's on 19x8.5's.
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